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Colouring on the charts is implies >90% significance for the anomaly from ER-M-Climate. White shading on the maps only implies <90% significance of the anomaly . It and show where the ensemble forecast is not significantly different from the extended range climatology, according to a Wilcoxon-Mann-Whitney (WMW) test. It does not necessarily point to a forecast of average nor to a 'don't know' forecast of climatology.
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